/**
 * Copyright (c) 2011 by Kevin Bierhoff.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *    1. Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *    3. Neither the names of the authors nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.googlecode.syper.test.javasyp.logic;

import com.googlecode.syper.anno.Excl;
import com.googlecode.syper.anno.ReturnExcl;

import edu.cmu.cs.crystal.annotations.FailingTest;
import edu.cmu.cs.crystal.annotations.UseAnalyses;

/**
 * Tests assigning null to {@link @Excl} variables,
 * which should not result in disjointness predicates
 * @author kevin
 * @since Apr 24, 2011
 */
@FailingTest(6)
@UseAnalyses("SymbolicChecker")
public class DisjointFail {
	
	@Excl Object a; 
	@Excl Object b;
	
	public void nullInitializers() {
		@Excl Object a = null;
		@Excl Object b = null;
		assert a != b;
	}
	
	public void nullAssignments(@Excl Object a, @Excl Object b, @Excl Object c) {
		a = null;
		if (c == null) {
			b = c;
			assert a != b;
		} else {
			b = null;
			assert a != b;
		}
		assert a != b;
	}
	
	@Excl(mod = {"a", "b"}) public void reset() {
		excl: {
			a = null;
			b = null;
			assert a != b;
		}
	}

	@Excl(mod = {"a", "b"}) public void set() {
		@Excl(borrowed = false) Object x = get(); 
		@Excl(borrowed = false) Object y = get();
		excl: {
			a = x;
			b = y;
			assert a != b;
		}
	}
	
	@ReturnExcl public static Object get() { return null; }
}
